Renovating a Montclair Victorian: What Older NJ Homes Actually Cost

Renovating a Montclair Victorian is not the same job as renovating a 1985 colonial, and pretending otherwise is how homeowners end up $60,000 over budget with a stack of change orders. Montclair has one of the most distinctive housing stocks in New Jersey: Queen Anne and Second Empire Victorians, Colonial Revivals, Craftsman bungalows and Tudors, a great many of them a century or more old, plus several designated historic districts.

They are beautiful houses. They are also full of systems and assemblies that were state of the art in 1905 and are now at the end of their life. Here is an honest accounting of what that means for a budget.

Why renovating a Montclair Victorian costs more than a postwar house

The short version: in a postwar house, what you see is roughly what you get. In a house from 1890 or 1915, the finished surfaces hide four or five separate conditions, each with its own cost, several of them regulated. A contractor who has only worked on newer homes will price the visible scope and miss all of it. That is the underbid that turns into change orders in month two.

Plaster and lath is a real budget fork

Original walls are wood lath with three coats of plaster over it, not drywall. It is harder, thicker and better at sound than drywall, and when it is sound it is worth keeping. The decision tree looks like this:

• Patch only. Isolated cracks and small failures, keying still intact behind the lath. Cheapest by far, roughly $8 to $20 per square foot of affected area, and it preserves original trim reveals.
• Skim coat. Walls are sound but the surface is spidered, wavy or has decades of bad paint. A veneer plaster or joint compound skim over the whole wall. Commonly $4 to $9 per square foot of wall area.
• Full removal and replace with drywall. Necessary when the plaster keys have let go across large areas, or when you need the walls open anyway for wiring and mechanicals. This is the most expensive path, typically $9 to $18 per square foot including demolition, disposal, insulation and finish, and it costs you the original wall thickness and often forces trim modifications.

Do not let anyone quote you a room without saying which of these three they assumed. It is the single most common place two proposals diverge.

Knob-and-tube wiring

Knob-and-tube is the original electrical system in most of these houses: individual hot and neutral conductors run separately through porcelain knobs and tubes, with no ground conductor, insulated in rubber and cloth that is now brittle.

Two things make it a budget item rather than a curiosity. First, insurance: many carriers will not write or renew a policy on a house with active knob-and-tube. Second, it should not be buried in insulation, which is exactly what happens when someone insulates an old attic without checking.

The part people are not ready for: a partial rewire usually becomes a whole-house rewire. You open a wall to replace one circuit, and the circuit does not stop at that wall. It daisy-chains through joist bays into three other rooms with splices in inaccessible places. Once you are chasing it, the honest answer is almost always to pull it all and start clean. A full rewire on a large older Montclair home commonly runs $18,000–$45,000 depending on square footage, number of stories and how much finished surface has to be opened, plus a service and panel upgrade on top if the existing service is undersized.

Supply and waste lines at end of life

Galvanized steel supply piping corrodes from the inside. The house may have adequate pressure at the main and terrible pressure at the second-floor bathroom, which is the tell. Cast iron waste stacks last a long time but not forever, and after 90 to 110 years they thin out and start weeping at the joints or scaling internally.

Replacing supply lines throughout a three-story house is commonly $12,000–$30,000. Replacing a main cast iron stack is its own project, often $4,000–$12,000 depending on access, because it runs vertically through the middle of the house and everything around it has to be opened.

Balloon framing

Most pre-1930 houses here are balloon framed: the wall studs run continuously from the sill plate to the roof, rather than stopping at each floor. Two practical consequences.

One, fire safety. Those continuous cavities act as open chimneys, so modern code expects fire blocking at floor lines, and adding it when walls are open is both required and worth doing.

Two, it is easier to run new wiring and pipe vertically (the bays are open) and harder to run anything horizontally (you are cutting through studs). Contractors used to platform framing routinely guess wrong on this.

Lead paint and the RRP rule

Any home built before 1978 may contain lead-based paint, which covers essentially all of this housing stock. Under the federal Renovation, Repair and Painting rule, a contractor disturbing painted surfaces in a pre-1978 home must be certified and must use a certified renovator, with specific containment, work practice and cleanup requirements.

This is not paperwork. It adds real labor: plastic containment, HEPA vacuuming, wet methods, cleaning verification. Expect it to add meaningfully to any scope involving window replacement, trim removal, or demolition of painted surfaces. A contractor whose price does not reflect it either is not certified or is not planning to comply.

Asbestos

The two usual locations are pipe insulation (the white wrap on old steam and hot water lines in the basement) and 9x9 floor tile with its black mastic. Neither is dangerous undisturbed. Both require licensed abatement if you are going to disturb them, and that is a separate contractor with separate pricing, commonly $1,500–$8,000 depending on quantity and access. Have it tested before demolition, not during. Finding it mid-project stops the job.

Windows: repair or replace

Both sides of this argument have a point.

Original wood windows in these houses are old-growth wood, true divided light, with sash weights and pockets. Well-made ones can be restored: reglaze, replace the cords, strip and repaint, add weatherstripping, and add a good storm window on the exterior. Restoration runs roughly $600–$1,400 per window and the result performs close to a decent replacement unit while keeping the look and the wood.

Replacement with a quality wood or clad unit runs roughly $900–$2,200 per window installed, and more if the openings are non-standard, which in these houses they usually are. It buys you easier operation and better sealing, and it loses you the original glass and the original sightlines.

The point that decides it for many people: in a designated historic district, exterior changes including windows may be subject to review. Before you plan any exterior work, confirm whether your specific property is in a historic district and what the review process is. Ask the township, not your neighbor. Two houses on the same street can fall differently.

Budgeting honestly: contingency is not optional here

On a postwar house, a 10 percent contingency is reasonable. On a century-old house you are opening up, plan on 15 to 25 percent, and be glad if you do not spend it.

That is not padding. It is the honest price of not knowing what is behind the plaster until it comes off. The things that eat it are predictable in category even when they are unpredictable in specifics: rotted sill or joist ends near old plumbing leaks, undersized or notched framing, a chimney that turns out to be unlined, knob-and-tube that runs further than expected, a plaster wall that fails as soon as it is disturbed.

The failure mode to avoid: a contractor who has never opened a house like this bids it like a newer house, wins on price, and then converts every discovery into a change order at whatever rate he chooses. You did not save money. You just moved the number to a place where you had less leverage.

Ask any contractor you are considering for two or three older Montclair-area homes they have actually worked on, and ask specifically how they handled the wiring and the plaster.

What to do in what order

If you are doing the whole house, sequence by what is hidden, not by what you want most:

1. Roof and building envelope, so nothing new gets wet 2. Testing: lead, asbestos, structural assessment 3. Electrical service, panel and rewire 4. Plumbing supply and waste replacement 5. HVAC and insulation 6. Plaster and drywall 7. Windows and exterior (after historic district review, if applicable) 8. Kitchens, baths and finishes last

Finishing a kitchen and then discovering the stack has to come out through it is the expensive version of doing this in the wrong order.

Abstract Roofing & Construction has worked on New Jersey homes for 20+ years, with 500+ projects completed and a 4.8 star rating from 41 Google reviews. We are licensed and insured, and we would rather tell you what an old house is going to cost before we start than after. Request a free estimate or call (201) 338-7663.

Related work we handle: whole-house renovation, kitchens, bathrooms and pitched roofing.

Frequently Asked Questions

Do I have to remove knob-and-tube wiring?

Not automatically, but two things usually force it. Insurance carriers often decline or non-renew policies on homes with active knob-and-tube, and the wiring should not be covered with insulation. Once you open walls for a renovation, a partial replacement almost always expands into a full rewire because the circuits run continuously between rooms.

Is my Montclair house in a historic district?

You need to confirm that for your specific address, because districts are drawn street by street and neighboring properties can fall on either side of a boundary. If it is in a district, exterior changes such as windows, siding or additions may require review before permits are issued. Check with the township before you finalize any exterior plan.

Should I keep the original plaster or replace it with drywall?

Keep it if it is sound. Plaster is thicker, harder and better acoustically than drywall, and preserving it keeps original trim reveals intact. Replace it when the keys have failed across large areas or when the walls have to come open anyway for wiring and plumbing, because at that point you are paying for the demolition regardless.

What does lead paint add to a renovation cost?

The federal RRP rule requires a certified renovator and specific containment, work practices and cleanup on any pre-1978 home where painted surfaces are disturbed. That adds labor and materials rather than a flat fee, and it shows up most on window, trim and demolition scopes. A bid that does not reflect it is a bid you should question.

How much contingency should I hold for a century-old house?

Fifteen to twenty-five percent of the construction budget, held separately from the contract price. The variables are rot at old plumbing penetrations, undersized or notched framing, unlined chimneys, and wiring that runs further than anyone expected. Money you do not spend stays yours.

Can I renovate one room at a time in a house this old?

You can, but sequence it around the hidden systems. Doing a beautiful room and then discovering the electrical or the waste stack has to be replaced through that same wall means tearing out finished work. Handle envelope, wiring and plumbing first, then finishes, even if that means the room you care about most comes last.